Anyone who's ever eaten an Oreo knows how difficult it can be to eat just one.
Scientists have long suspected that our brains crave junk food in the same way they crave other pleasurable substances, such as illegal drugs. Previous studies in rodents and in humans have shown the same area of the brain that lights up on scans when people use drugs, also shows increased activity when study participants consume, or even look at, high fat, high sugar foods like ice cream or bacon.
Some scientists believe certain foods trigger the brain to signal for more, similar to the way addictive drugs prompt cravings; if we don't fulfill the brain's request, the body could produce a physical response (like caffeine headaches) similar to withdrawal symptoms.
New research from undergraduate students at Connecticut College adds to the growing evidence suggesting that food can be addictive. The students were interested in understanding how the availability of junk food in low-income areas has contributed to America's obesity epidemic.